Arching his back, the burly firefighter, hidden in plain sight among commuters, unzips his pants. His massive, uncut cock springs free, throbbing with anticipation. He strokes his thick shaft, his muscled arm flexing with each pump. The crowded train offers no privacy, but the thrill of being caught only heightens his pleasure. His breath hitches as he nears climax, a thick load erupting from his cock head, painting the filthy train floor.